Analysis of information sources in references of the Wikipedia article "Shortbread" in English language version.
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Another staple is, of course, shortbread. This sweet buttery treat originated in Scotland...
...not all shortbread is made with white flour. On Orkney, where a tasty Neolithic barley known as "bere" is still grown and milled, bakers add a little of this flour to their shortbread. Others add rolled oats to provide more flavour and texture.